[SCSI] aic7xxx: final fixes for DT handling

The aic7xxx can support Data Group transfers at periods > 12.5, so
eliminate that restriction.  Additionally wide is a requirement for DT
so ensure wide is set if users request DT.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c
index d0d0b84..d79a2ae 100644 (file)
--- a/drivers/scsi/aic7xxx/aic7xxx_osm.c
+++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c
@@ -2429,16 +2429,16 @@ static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
        unsigned int ppr_options = tinfo->goal.ppr_options
                & ~MSG_EXT_PPR_DT_REQ;
        unsigned int period = tinfo->goal.period;
+       unsigned int width = tinfo->goal.width;
        unsigned long flags;
        struct ahc_syncrate *syncrate;
 
        if (dt) {
-               period = 9;     /* 12.5ns is the only period valid for DT */
                ppr_options |= MSG_EXT_PPR_DT_REQ;
-       } else if (period == 9) {
+               if (!width)
+                       ahc_linux_set_width(starget, 1);
+       } else if (period == 9)
                period = 10;    /* if resetting DT, period must be >= 25ns */
-               ppr_options &= ~MSG_EXT_PPR_DT_REQ;
-       }
 
        ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
                            starget->channel + 'A', ROLE_INITIATOR);